Study of soil formation and classification of Islamic Azad University - Fasa branch’s lands
Subject Areas : Agroecology Journal
1 - Scientific board of Islamic Azad University – Fasa branch
Keywords: Soil classification, Soil genesis, Inceptisols, Calcic horizon,
Abstract :
In order to identification, classification and soil formation in Islamic Azad University of Fasa branche’s lands were studied. These lands including two parts, one of them with 12 hectares extent located in 5 km of the west of Fasa and other one with 220 hectares extent located in 15 km of the west of Fasa in Fars province. Soil moisture and thermal regime is xeric and thermic respectively. For investigations of these lands, topographic maps were used and many profiles were dogged and after soil morphology surveys, soil sampling and physical and chemical experiments were done. Investigation of physico-chemical and morphological properties of these soil showed they were Lomy-skeletal, mixed, thermic, Typic Calcixereots soils. These soil don’t have properties of other orders and have a calcic horizon in xeric moisture regime, therefore these soils are inceptisol.In these soils strongly effect of parent material in soil formation is observed. Light texture and a lot of gravels and cobbles in these soils are caused to increase permeability rate and carbonates leaching from upper horizons and accumulation in soil lower horizons. In calic horizon, lime is observed as pendant concretion and powdery pockets.
1 - اوجی، م. ر. 1376. مطالعه و بررسی خصوصیات فیزیکوشیمیایی، مورفولوژیکی و کانیشناسی برخی از خاکهای جلگههای مرتفع استان فارس. پایان نامه کارشناسی ارشد بخش خاکشناسی، دانشگاه شیراز.
2 – بایبوردی، م.1360. خاک: پیدایش و رده بندی. انتشارات دانشگاه تهران. 680صفحه.
3- Abtahi, A. 1980. Soil genesis as affected by topography and time in calcareous parent materials. Soil Sic. Soc. Am. J. 44:329-336.
4- Abtahi, A. 1989. Soil genesis as affected by topography and depth of saline and sodic ground water under semiarid condition of Iran. Iran. Agric. Res. 8:1-21.
5- Arkley, R. J. 1963. Calculation of carbonates and water movement in soil from climatic data. Soil Sci. 96:239-248.
6- Birkeland, P. W. 1969. Quaternary paleo climatic implications of soil clay minerals distribution in a navada Great Basin transect. J. Geol. 77:289-302.
7- Bouyoucos, G. J. 1951. A recalibration of the hydrometer method for making mechanical analysis of soil. Agron. J. 43:434-438.
8- Chapman, H. D. 1965. Cation exchange capacity. In: C, A. Black (ed). Methods of Soil analysis. Part II. Am. Soc. Agron. Madison, WI.
9- Fisher, W. L., J. H. Mc Gowen, L. F. Brown, and G. G. Groat. 1972. Environmental geologic atlas of the Texas coastal Zone-Galveston-Houston area. Bureau of Econ. Geol., Unit. Texas, Austin, U.S.A.
10- Jackson, M. L. 1975. Soil chemical analysis Advanced course, Univiversity of Wisconsin, College Agric. Dept. Soils, Madison, WI.
11- Mueller, G. 1960. The theory of formation of north Chilean nitrate deposits through Capillary concentration. International Geological congress. Rpt. of the 21st session, Norden. Part 1: 76-78.
12- Ogg, C. M., J. C. Baker. 1999. Pedogenesis and origin of deeply weathered soils formed in alluvial fans of the Virginia Blue Ridge. Soil Sci. Soc. Am. J. 63(3): 601-606.
13- Redmond, C. E., and J. E. Mc Clelland. 1959.The occurrence and distribution of lime in Clacium carbonate solonchak and associated Soils of eastern north Dokata. Soil Sci. Soc. Am. Proc.23: 61-65.
14- Rostad, H. P. W., R. J. St. Arnaud. 1968. The Nature of carbonates minerals in two saskatchewan soils. Can. J. Soil Sci. 50: 65-70.
15- Sawhney, J. S., V. K. Verma, B. D. Sherma and P. K. Sherma. 1992. Pedogenesis in relation to physiography in semi-arid condition of Punjab, India, Arid Soil Research Rehabilittion. 6: 93-103.
16- Soil Survey Staff. 2003. Keys to Soil taxonomy. 9th edition. Soil Manage. Support. serv. Tech. Mongr. 19. Pocahntas.press, Blacksubg, VA.
17- U. S. Salinity Laboratory Staff. 1954. Diagnosis improvement of Saline and alkali Soils. USDA Handbook. 60.
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